Join space scientists marking Apollo anniversary

Join online as leading space scientists discuss the legacy of Apollo 11 during the mission’s 50th anniversary this week.

The eclipse that marked the start of the Iroquois Confederacy

The total solar eclipse of August 22, 1142, may have coincided with the birth of the Iroquois Confederacy, oldest democracy in North America and possibly on Earth.

What’s a Blood Moon?

In some circles of Christian prophecy, a Blood Moon is a member of a special kind of lunar tetrad : four total lunar eclipses in a row, each separated by six lunar months. By this definition, the last Blood Moon occurred on September 28, 2015.

Gray spacecraft over barren orange hills and plain with a yellow sky.

Dragonfly aims for Saturn’s moon Titan

Scheduled for launch in 2026, the Dragonfly mission will look for clues to the origins of life, and possibly even evidence of life itself, on Saturn’s alien yet remarkably Earth-like moon Titan.

What’s the July birthstone?

Happy birthday to all you July babies! Your birthstone, the ruby, is among the most highly prized of gemstones.

Today in science: 1st Telstar launch

Telstar was the 1st satellite to relay television signals between Europe and North America. It launched on this date … and helped change the world.  

Video: Moon hoax not

Don’t believe the moon landings were real? Go ahead. Watch this.

Map showing July 6, 2019 earthquake epicenter. It is north of a line - about equidistant - from Los Angeles and Las Vegas, Nevada.

California shakes from 2nd big quake in 2 days

An earthquake scientist said of the recent 2 big California earthquakes, “… the M6.4 was a foreshock. This was a M7.1 on the same fault … part of the same sequence.” She added it will not trigger another large earthquake outside the Ridgecrest, California, area.

Asteroid Day is June 30

The 5th annual Asteroid Day is Sunday, June 30. Here’s how to participate.

Photo showing a volcanically active area in Hawaii

US revamps volcano early warning system

There are 161 active volcanoes in the United States, more than 1/3 of which have been classified as posing a high threat to nearby communities. A new law aims to improve volcano monitoring.

Vertical while line in a blue sky.

Watch night launch of SpaceX Falcon Heavy June 24

Liftoff is targeted at 11:30 p.m. EDT, with a 4-hour launch window. SpaceX is calling the launch its most difficult ever, because the rocket must release 24 satellites into 3 different orbits.

Helicopter propeller mounted on a metal stand, resting on a tabletop.

Mars Helicopter passes key tests

The Mars Helicopter will launch with Mars 2020. It’ll be the first vehicle in history to attempt to establish the viability of heavier-than-air vehicular flight on another planet. Plus … space engineers celebrate with a selfie after attaching the Mars 2020 rover’s remote sensing mast.

Today in science: Sally Ride in space

She was the 1st American woman in space, eventually flying on 2 Space Shuttle missions. She played a key role in the investigation of the Space Shuttle Challenger disaster. And she inspired people.

Two Friday the 13ths in 2019

Do you have friggatriskaidekaphobia … an irrational fear of Friday the 13th? Today isn’t Friday the 13th. But it is exactly 13 weeks before a Friday the 13th in September. Then, exactly 13 weeks after that, 2019’s second Friday the 13th will fall in December. Zoinks!

White diagonal lines across a black background. White dots of various sizes scattered across the image.

US astronomers speak on SpaceX Starlink satellites

The American Astronomical Society – chief organization for US astronomers – said it is in conversations with SpaceX about the impending launch of 12,000 Starlink satellites. The astronomers worry the satellites will interfere with their work of understanding the universe.

Exoplanet landscape, composed by an artist.

IAU invites countries to name exoplanets

Nearly 100 countries have already signed up to organize national campaigns, to provide the public with an opportunity to vote. The deadline is July 30 to express interest in organizing a national campaign. The IAU will announce results in December.

Waterfall illusion: Still objects seem to move

Check out this optical illusion and find out what it says about your brain.

Going to the beach? Watch this video

Rip currents – sometimes called by the misnomer rip tide – flow outward from beaches, sometimes faster than humans can swim. Here’s what to do if you get caught in one.

Lake Baikal: Earth’s deepest, oldest lake

Lake Baikal in southern Siberia is 25 million years old and more than 5,000 feet (1,500 meters) deep. More than 2,500 plant and animal species have been documented in the lake, most found nowhere else. Controversy surrounds construction of hydropower stations on a river that feeds the lake.

Did supernovae blasts prompt humans to walk upright?

A new study suggests a series of supernovae – peaking 2.6 million years ago – might have triggered earthly events that promoted proto-humans’ upright walking.